Reorganize python tests.

Merge batch_others and batch_pg_regress. The original idea was to
split all the python tests into multiple "batches" and run each batch
in parallel as a separate CI job. However, the batch_pg_regress batch
was pretty short compared to all the tests in batch_others. We could
split batch_others into multiple batches, but it actually seems better
to just treat them as one big pool of tests and use pytest's handle
the parallelism on its own. If we need to split them across multiple
nodes in the future, we could use pytest-shard or something else,
instead of managing the batches ourselves.

Merge test_neon_regress.py, test_pg_regress.py and test_isolation.py
into one file, test_pg_regress.py. Seems more clear to group all
pg_regress-based tests into one file, now that they would all be in
the same directory.

.github/actions/run-python-test-set/action.yml

@@ -149,7 +149,7 @@ runs:
         fi
 
     - name: Upload Allure results
-      if: ${{ always() && (inputs.test_selection == 'batch_others' || inputs.test_selection == 'batch_pg_regress') }}
+      if: ${{ always() && (inputs.test_selection == 'regress') }}
       uses: ./.github/actions/allure-report
       with:
         action: store

.github/workflows/build_and_test.yml

@@ -206,7 +206,7 @@ jobs:
         if: matrix.build_type == 'debug'
         uses: ./.github/actions/save-coverage-data
 
-  pg_regress-tests:
+  regress-tests:
     runs-on: dev
     container:
       image: 369495373322.dkr.ecr.eu-central-1.amazonaws.com/rust:pinned
@@ -224,42 +224,13 @@ jobs:
           submodules: true
           fetch-depth: 2
 
-      - name: Pytest regress tests
+      - name: Pytest regression tests
         uses: ./.github/actions/run-python-test-set
         with:
           build_type: ${{ matrix.build_type }}
           rust_toolchain: ${{ matrix.rust_toolchain }}
-          test_selection: batch_pg_regress
+          test_selection: regress
           needs_postgres_source: true
-
-      - name: Merge and upload coverage data
-        if: matrix.build_type == 'debug'
-        uses: ./.github/actions/save-coverage-data
-
-  other-tests:
-    runs-on: dev
-    container:
-      image: 369495373322.dkr.ecr.eu-central-1.amazonaws.com/rust:pinned
-      options: --init
-    needs: [ build-neon ]
-    strategy:
-      fail-fast: false
-      matrix:
-        build_type: [ debug, release ]
-        rust_toolchain: [ 1.58 ]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-        with:
-          submodules: true
-          fetch-depth: 2
-
-      - name: Pytest other tests
-        uses: ./.github/actions/run-python-test-set
-        with:
-          build_type: ${{ matrix.build_type }}
-          rust_toolchain: ${{ matrix.rust_toolchain }}
-          test_selection: batch_others
           run_with_real_s3: true
           real_s3_bucket: ci-tests-s3
           real_s3_region: us-west-2
@@ -307,7 +278,7 @@ jobs:
     container:
       image: 369495373322.dkr.ecr.eu-central-1.amazonaws.com/rust:pinned
       options: --init
-    needs: [ other-tests, pg_regress-tests ]
+    needs: [ regress-tests ]
     if: always()
     strategy:
       fail-fast: false
@@ -330,7 +301,7 @@ jobs:
     container:
       image: 369495373322.dkr.ecr.eu-central-1.amazonaws.com/rust:pinned
       options: --init
-    needs: [ other-tests, pg_regress-tests ]
+    needs: [ regress-tests ]
     strategy:
       fail-fast: false
       matrix:
@@ -587,7 +558,7 @@ jobs:
     #container: 369495373322.dkr.ecr.eu-central-1.amazonaws.com/base:latest
     # We need both storage **and** compute images for deploy, because control plane picks the compute version based on the storage version.
     # If it notices a fresh storage it may bump the compute version. And if compute image failed to build it may break things badly
-    needs: [ push-docker-hub, calculate-deploy-targets, tag, other-tests, pg_regress-tests ]
+    needs: [ push-docker-hub, calculate-deploy-targets, tag, regress-tests ]
     if: |
       (github.ref_name == 'main' || github.ref_name == 'release') &&
       github.event_name != 'workflow_dispatch'
@@ -642,7 +613,7 @@ jobs:
     runs-on: dev
     container: 369495373322.dkr.ecr.eu-central-1.amazonaws.com/base:latest
     # Compute image isn't strictly required for proxy deploy, but let's still wait for it to run all deploy jobs consistently.
-    needs: [ push-docker-hub, calculate-deploy-targets, tag, other-tests, pg_regress-tests ]
+    needs: [ push-docker-hub, calculate-deploy-targets, tag, regress-tests ]
     if: |
       (github.ref_name == 'main' || github.ref_name == 'release') &&
       github.event_name != 'workflow_dispatch'