fix: fix the inconsistency in filename drive letters

[He1pa]

fix the inconsistency in filename drive letters in Windows caused bycanonicalize() function

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

• N
• Y fix Language server compilation error and no syntax highlighting in vscode when code is valid on Windows #1251

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

kclvm/parser/src/parser/mod.rs

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

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

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

• N
• Y

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

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

[Peefy]

LGTM

[coveralls]

Pull Request Test Coverage Report for Build 8979050244

Details

• 26 of 26 (100.0%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.008%) to 71.176%

---

Files with Coverage Reduction	New Missed Lines	%
kclvm/parser/src/parser/mod.rs	2	98.0%

Totals
Change from base Build 8978945723:	0.008%
Covered Lines:	52962
Relevant Lines:	74410

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 8999210228

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

• 29 of 29 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 71.171%

---

Totals
Change from base Build 8994730680:	0.03%
Covered Lines:	53021
Relevant Lines:	74498

---

💛 - Coveralls

[Peefy]

LGTM