Restrict dropping of specific extended stored procedures

[roshan0708]

Description

This commit adds a check to prevent dropping of specific extended stored procedures:

• xp_qv
• xp_instance_regread
• sp_addlinkedsrvlogin
• sp_droplinkedsrvlogin
• sp_dropserver
• sp_enum_oledb_providers
• sp_testlinkedserver

These procedures are critical and should not be dropped accidentally.

Issues Resolved

Task: BABEL-4390

Test Scenarios Covered

• Use case based - Yes

• Boundary conditions - Yes

• Arbitrary inputs - Yes

• Negative test cases - yes

• Minor version upgrade tests -

• Major version upgrade tests -

• Performance tests -

• Tooling impact -

• Client tests -

Check List

• [x] 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 9668571287

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.001%) to 73.209%

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Totals
Change from base Build 9647525510:	0.001%
Covered Lines:	42827
Relevant Lines:	58500

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9682613281

Details

• 7 of 7 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.002%) to 73.21%

---

Totals
Change from base Build 9647525510:	0.002%
Covered Lines:	42831
Relevant Lines:	58504

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9682796338

Details

• 7 of 7 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.002%) to 73.21%

---

Totals
Change from base Build 9647525510:	0.002%
Covered Lines:	42831
Relevant Lines:	58504

---

💛 - Coveralls

[shalinilohia50]

1. Please update the PR description accordingly. Add Signed-off-by: too.
2. Shouldn't we add tests to other schedule files as well? Or just latest/schedule is enough?

[coveralls]

Pull Request Test Coverage Report for Build 9693182411

Details

• 7 of 7 (100.0%) changed or added relevant lines in 1 file are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.003%) to 73.205%

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Files with Coverage Reduction	New Missed Lines	%
contrib/babelfishpg_tds/src/backend/tds/tdscomm.c	3	73.33%
<!--	Total:	3		-->

Totals
Change from base Build 9647525510:	-0.003%
Covered Lines:	42828
Relevant Lines:	58504

---

💛 - Coveralls