Add a test for GrapgQL

[a-masterov]

Problem

We currently don't run the tests shipped with pg_graphql.

Summary of changes

The tests for pg_graphql are added.

[github-actions]

7095 tests run: 6797 passed, 0 failed, 298 skipped (full report)

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Flaky tests (5)

Postgres 17

• test_physical_replication_config_mismatch_max_locks_per_transaction: release-arm64

Postgres 16

• test_pgdata_import_smoke[None-1024-RelBlockSize.MULTIPLE_RELATION_SEGMENTS]: release-arm64

Postgres 14

• test_pgdata_import_smoke[None-1024-RelBlockSize.MULTIPLE_RELATION_SEGMENTS]: release-arm64
• test_pgdata_import_smoke[8-1024-RelBlockSize.MULTIPLE_RELATION_SEGMENTS]: release-arm64
• test_lr_with_slow_safekeeper: release-arm64

Code coverage* (full report)

• functions: 31.3% (8392 of 26807 functions)
• lines: 48.0% (66614 of 138829 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
25cbfc7 at 2024-12-17T22:01:52.100Z :recycle:}