feat: Add Database Tests for Container Images - Postgres, Redis, Valkey, Memcached

[MadhurAggarwal]

Add Container Runtime Tests for 4 DataStores

• Valkey
• Redis (available as valkey-compat-redis)
• Postgres
• Memcached

Each added test contains:

• Docker file to install the corresponding package
• Test file, which starts the server for each datastore, and contains 2 tests - Version Test to check the sanity / installation, and a Core Functionality Test (Create-Insert-Select for Postgres, LPUSH for Redis/Valkey, and Set-Get for Memcached)

PR Testing:
Locally built a container image and tested using azldev tool:

• Memcached Tests

• Postgres Tests

• Redis Tests

• Valkey Tests

Also run ruff formatting tests:

[Copilot]

Pull request overview

Adds container runtime coverage for four datastore packages.

Changes:

• Adds version and core functionality tests for Valkey, Redis compatibility, PostgreSQL, and Memcached.
• Adds Dockerfiles installing each datastore package.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test_valkey/test_valkey.py	Tests Valkey startup, version, and list operations.
test_valkey/Dockerfile	Installs Valkey.
test_redis/test_redis.py	Tests Redis-compatible commands and list operations.
test_redis/Dockerfile	Installs the Redis compatibility package.
test_postgres/test_postgres.py	Tests PostgreSQL initialization, connectivity, and SQL operations.
test_postgres/Dockerfile	Installs PostgreSQL client and server.
test_memcached/test_memcached.py	Tests Memcached startup and set/get behavior.
test_memcached/Dockerfile	Installs Memcached and Ncat.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated no new comments.