DO NOT MERGE [RND-643] Investigate Serializable Snapshot Isolation (SSI) in PostgreSQL

[jleiva-gap]

• Add retry logic to upsert, update and delete.
• Update transactions to use SSI.
• Add validation to retry, when error code: 40001.
• Add the POSTGRES_MAX_NUMBER_OF_RETRIES to env file. Add tests to validate changes.
• Remove FOR SHARE NOWAIT from select

Description

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have signed all of the commits on this PR.
• I have agreed to the Ed-Fi Individual Contributors' License
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[jleiva-gap]

With the change some of the tests are generating deadlocks and must be addressed. The results were documented in the main repository