feat(coverage): supports a new bash script

[Lance52259]

What this PR does / why we need it:

New script supported for function coverage tests.

Which issue this PR fixes:
(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)
fixes #xxx

Special notes for your reviewer:

Release note:

1. supports a new bash script to test the function's coverage.

PR Checklist

• Tests added/passed.

scripts/coverage.sh -o asm
Prepare to calculate the coverage the following command:
TF_ACC=1 go test "./huaweicloud/services/acceptance/asm" -v -coverprofile="./huaweicloud/services/acceptance/asm/asm_coverage.cov" -coverpkg="./huaweicloud/services/asm" -run TestAcc -timeout 360m -parallel 5
=== RUN   TestAccResourceAsmMesh_basic
=== PAUSE TestAccResourceAsmMesh_basic
=== CONT  TestAccResourceAsmMesh_basic
--- PASS: TestAccResourceAsmMesh_basic (888.29s)
PASS
coverage: 78.0% of statements in ./huaweicloud/services/asm
ok      github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/services/acceptance/asm       888.343s        coverage: 78.0% of statements in ./huaweicloud/services/asm

• Documentation updated.
• Schema updated.
• CheckDeleted.

[github-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This PR has been approved by: @Lance52259