Added kpm_update.rs with working tests

[d4v1d03]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• Y

2. What is the scope of this PR (e.g. component or file name):

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• Contains syntax changes
• Contains experimental features
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test

[github-actions]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[coveralls]

Pull Request Test Coverage Report for Build 7987513826

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

• -26 of 53 (50.94%) changed or added relevant lines in 2 files are covered.
• 108 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.03%) to 71.797%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
kclvm/driver/src/tests.rs	7	14	50.0%
kclvm/driver/src/kpm_update.rs	20	39	51.28%

Files with Coverage Reduction	New Missed Lines	%
kclvm/sema/src/ty/mod.rs	12	88.1%
kclvm/tools/src/LSP/src/request.rs	14	66.44%
kclvm/tools/src/LSP/src/completion.rs	82	88.52%

Totals
Change from base Build 7986101701:	-0.03%
Covered Lines:	44300
Relevant Lines:	61702

---

💛 - Coveralls

[d4v1d03]

I have read the CLA Document and I hereby sign the CLA

[d4v1d03]

recheck

[Peefy]

LGTM

[Peefy]

LGTM