NetworkPkg: Restore TPL Before Return

[os-d]

Description

This patch fixes a few instances of error cases in NetworkPkg returning after a RaiseTpl call without restoring the TPL first.

• Breaking change?
  • Breaking change - Does this PR cause a break in build or boot behavior?
  • Examples: Does it add a new library class or move a module to a different repo.
• Impacts security?
  • Security - Does this PR have a direct security impact?
  • Examples: Crypto algorithm change or buffer overflow fix.
• Includes tests?
  • Tests - Does this PR include any explicit test code?
  • Examples: Unit tests or integration tests.

How This Was Tested

Code review.

Integration Instructions

N/A.

[os-d]

@ajfish @leiflindholm @mdkinney @SaloniKasbekar @Zclarkwilliams friendly ping to review this small PR.

[os-d]

@ajfish @leiflindholm @mdkinney @SaloniKasbekar @Zclarkwilliams another friendly ping to review please

[os-d]

@ajfish @leiflindholm @mdkinney @SaloniKasbekar @Zclarkwilliams can someone review this small PR?

[os-d]

@ajfish @leiflindholm @mdkinney @SaloniKasbekar @Zclarkwilliams can you please review this small PR to get it in for the stable tag?

[os-d]

@ajfish @leiflindholm @mdkinney @SaloniKasbekar @Zclarkwilliams there is no NetworkPkg maintainer, can you please review this small PR? The process is that the stewards need to review in the absence of a maintainer, right?

[mdkinney]

There are reviewers and I asked them to review. Stewards can fill role of Maintainer after review is complete

[os-d]

@mdkinney it's been 6 weeks and the reviewers are not reviewing :)

[mdkinney]

If this is considered a critical bug fix for edk2-stable202411, then please prefix title with [edk2-stable202411] and add justification for why this must be included in this release.

[os-d]

If this is considered a critical bug fix for edk2-stable202411, then please prefix title with [edk2-stable202411] and add justification for why this must be included in this release.

I don't think this needs to be included in the stable tag. It just had been sitting for 6 weeks so I was trying to get traction on the simple bugfixes here. They are bugfixes, but only ones seen through code inspection, so no urgency to get into the stable tag.

[os-d]

@mdkinney I have scoped this PR to only the restore TPL fixes and @Zclarkwilliams has reviewed. Please re-review when you have a chance. As I mentioned, I don't think this needs to hit the stable tag, but certainly can if desired.