fix issues found by Coverity Scan in tire.c (branch: 2.6)

[xiaopingcs]

Bug Description
fix issues found by Coverity Scan in TDengine/src/kit/shell/src/tire.c

To Reproduce
N/A

Expected Behavior
fix following issues:

Type	Category	Function	Line Number
Missing break in switch	Control flow issues	matchPrefix	334
Use after free	Memory - illegal accesses	enumAll	Various
Missing break in switch	Control flow issues	enumAll	396
Resource leak	Resource leaks	matchPrefixFromTree	324
Resource leak	Resource leaks	enumFromTree	386
Use after free	Memory - illegal accesses	enumFromTree	Various
Copy into fixed size buffer	Security best practices violations	enumAllWords	249

Screenshots
N/A

Environment (please complete the following information):
N/A

Additional Context
above issues found by https://scan.coverity.com/projects/tdengine?tab=overview

[Azanul]

Is this issue still relevant? The file seems to have been moved from TDengine/src/kit/shell/src/tire.c