fix : panic caused by duplicated keys in schema

[NeverRaR]

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

• N
• Y

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

/kclvm/runtime

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

fix : panic caused by byduplicated keys in schema

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

The test cases in test/grammar/schema/duplicated_key are used to test whether duplicated keys in schema will cause panic

6. Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[coveralls]

Pull Request Test Coverage Report for Build 3416182728

• 30 of 49 (61.22%) changed or added relevant lines in 9 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-30.7%) to 59.061%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
kclvm/runtime/src/crypto/crypto.rs	0	1	0.0%
kclvm/runtime/src/units/units.rs	0	1	0.0%
kclvm/runtime/src/context/mod.rs	0	2	0.0%
kclvm/runtime/src/value/val_bin_aug.rs	3	5	60.0%
kclvm/runtime/src/value/val_type.rs	0	3	0.0%
kclvm/runtime/src/value/api.rs	0	5	0.0%
kclvm/runtime/src/value/val_union.rs	22	27	81.48%

Totals
Change from base Build 3410446908:	-30.7%
Covered Lines:	19737
Relevant Lines:	33418

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💛 - Coveralls

[Peefy]

LGTM

[chai2010]

LGTM