Prevent dropping of critical system views, functions, and procedures

[roshan0708]

Description

This commit introduces restrictions to prevent the dropping of essential system views, functions, and procedures within the dbo schema for both TSQL and PSQL dialects:

• sp_addlinkedserver
• syspolicy_configuration
• syspolicy_system_health_state
• fn_syspolicy_is_automation_enabled

Generalized the restriction mechanism for handling all kinds of objects.

Issues Resolved

JIRA-5145, JIRA-5146

Test Scenarios Covered

• Use case based - y

• Boundary conditions -

• Arbitrary inputs -

• Negative test cases -

• Minor version upgrade tests -

• Major version upgrade tests -

• Performance tests -

• Tooling impact -

• Client tests -

Check List

• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is under the terms of the Apache 2.0 and PostgreSQL licenses, and grant any person obtaining a copy of the contribution permission to relicense all or a portion of my contribution to the PostgreSQL License solely to contribute all or a portion of my contribution to the PostgreSQL open source project.

For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[coveralls]

Pull Request Test Coverage Report for Build 13258679741

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 33 of 37 (89.19%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 75.006%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
contrib/babelfishpg_tsql/src/pl_handler.c	5	6	83.33%
contrib/babelfishpg_tsql/src/pl_funcs-2.c	28	31	90.32%

Totals
Change from base Build 13203692462:	0.03%
Covered Lines:	47109
Relevant Lines:	62807

---

💛 - Coveralls