chore(amber): move test-only deps to dev-requirements.txt (apache#5692)

### What changes were proposed in this PR?

Four test-only pins were sitting in the wrong file
(`amber/requirements.txt`), which leaked them into the production Docker
image and the LICENSE-binary snapshot. This PR moves them.

| Pin | Move |
| --- | --- |
| `pytest==7.4.0` | `requirements.txt` → `dev-requirements.txt` |
| `pytest-reraise==2.1.2` | `requirements.txt` → `dev-requirements.txt`
|
| `pytest-timeout==2.2.0` | `requirements.txt` → `dev-requirements.txt`
|
| `iniconfig==1.1.1` | `requirements.txt` → dropped entirely (pytest
transitive, auto-installed) |

Side effects:

| File | Change |
| --- | --- |
| `amber/system-requirements-lock.txt` | drop the same 4 lines (header:
*"This file must be updated whenever requirements.txt or
operator-requirements.txt changes"*) |
| `amber/LICENSE-binary-python` | drop the same 4 entries from the BSD
2-Clause / MIT blocks |

### Why this is safe

| Consumer | Before | After |
| --- | --- | --- |
| CI `pyamber` / `amber-integration` stacks | install `requirements.txt`
+ `operator-requirements.txt` + `dev-requirements.txt` — get pytest
twice | install all three — get pytest once (from dev-requirements) |
| `bin/computing-unit-master.dockerfile` (prod) | installs
`requirements.txt` + `operator-requirements.txt` — gets pytest, doesn't
need it | installs same two — no longer pulls pytest |
| `bin/computing-unit-worker.dockerfile` (prod) | same as master | same
as master |
| `PveManager.createNewPve` (per-user PVEs) | installs
`requirements.txt` only — gets pytest, doesn't need it | installs same —
no longer pulls pytest |
| `check_binary_deps.py` (LICENSE drift gate) | requires LICENSE-binary
entries because requirements.txt declares them | no longer requires
them; entries removed in lockstep |

The 1 non-test pytest import I found
(`amber/src/main/scala/.../aiassistant/test_type_annotation_visitor.py`)
is a pytest test that's accidentally placed under `src/main` by filename
convention (`test_*`); it's not invoked by the production runtime.

### Any related issues, documentation, discussions?

Closes apache#5691

### How was this PR tested?

- `git diff upstream/main --stat` — confirms only the four files above
are touched, with the expected `+6/-12` shape
- `grep -ciE "^(pytest|iniconfig| - pytest| - iniconfig)"
amber/requirements.txt amber/system-requirements-lock.txt
amber/LICENSE-binary-python` — all three return 0 after the change
- Repo-wide `grep -rIE "^(from|import)[[:space:]]+pytest"` shows 48
usages in `amber/src/test/python` (CI installs dev-requirements.txt, so
they keep working) and the 1 non-runtime file noted above

### Was this PR authored or co-authored using generative AI tooling?

Generated-by: Claude Code (Opus 4.7 [1M context])

---------

Co-authored-by: Yicong Huang <yiconghuang@cs.umass.edu>
Co-authored-by: Claude <noreply@anthropic.com>

Author: 3 people

amber/LICENSE-binary-python

@@ -262,22 +262,17 @@ Python packages:
   - h2==4.3.0
   - hpack==4.1.0
   - hyperframe==6.1.0
-  - iniconfig==1.1.1
   - jmespath==1.1.0
   - loguru==0.7.0
   - markdown-it-py==4.2.0
   - mdurl==0.1.2
   - mmh3==5.2.1
   - pampy==0.3.0
   - plotly==5.24.1
-  - pluggy==1.6.0
   - pydantic==2.13.4
   - pydantic-core==2.46.4
   - pyparsing==3.3.2
   - pyroaring==1.1.0
-  - pytest==7.4.0
-  - pytest-reraise==2.1.2
-  - pytest-timeout==2.2.0
   - pytz==2026.2
   - pyyaml==6.0.3
   - readerwriterlock==1.0.9

amber/dev-requirements.txt

@@ -20,6 +20,11 @@
 # pip-licenses output and never need to be tracked in LICENSE-binary
 # / NOTICE-binary. Not installed by packaging.
 
+# pytest test runner and plugins.
+pytest==7.4.0
+pytest-reraise==2.1.2
+pytest-timeout==2.2.0
+
 # Coverage instrumentation for pytest; emits coverage.xml consumed by
 # Codecov's Phase 1 upload.
 pytest-cov==5.0.0

amber/requirements.txt

@@ -19,18 +19,14 @@ setuptools==80.10.2
 numpy==2.1.0
 pandas==2.2.3
 ruff==0.14.7
-iniconfig==1.1.1
 loguru==0.7.0
 pyarrow==21.0.0
-pytest==7.4.0
 python-dateutil==2.8.2
-pytest-timeout==2.2.0
 protobuf==7.34.1
 betterproto==2.0.0b7
 pampy==0.3.0
 overrides==7.4.0
 typing_extensions==4.14.1
-pytest-reraise==2.1.2
 Deprecated==1.2.14
 fs==2.4.16
 bidict==0.22.0

amber/system-requirements-lock.txt

@@ -46,7 +46,6 @@ h2==4.3.0
 hpack==4.1.0
 hyperframe==6.1.0
 idna==3.15
-iniconfig==1.1.1
 jmespath==1.1.0
 loguru==0.7.0
 markdown-it-py==4.2.0
@@ -59,7 +58,6 @@ packaging==26.2
 pampy==0.3.0
 pandas==2.2.3
 pg8000==1.31.5
-pluggy==1.6.0
 praw==7.6.1
 prawcore==2.4.0
 propcache==0.5.2
@@ -73,9 +71,6 @@ pyiceberg==0.11.1
 pympler==1.1
 pyparsing==3.3.2
 pyroaring==1.1.0
-pytest==7.4.0
-pytest-reraise==2.1.2
-pytest-timeout==2.2.0
 python-dateutil==2.8.2
 pytz==2026.2
 readerwriterlock==1.0.9