fix(grpc-transcode): filter out illegal INT(string) formats

[zhoujiexiong]

Description

Need to sync. lua-protobuf lib. updated by this PR(https://github.com/starwing/lua-protobuf/pull/269).

Fixes #11355

Checklist

• [x] I have explained the need for this PR and the problem it solves
• [x] I have explained the changes or the new features added to this PR
• [x] I have added tests corresponding to this change
• [x] I have updated the documentation to reflect this change
• [x] I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[zhoujiexiong]

Hi @yzeng25 , It seems that other test case unrelated fail the check, please help confirm.

[zhoujiexiong]

Hi @yzeng25 , It seems that other test case unrelated fail the check, please help confirm.

Hi @yzeng25 , Still like that, unrelated.

[yzeng25]

Hi @yzeng25 , It seems that other test case unrelated fail the check, please help confirm.

Hi @yzeng25 , Still like that, unrelated.

Let's seek help from others who are more familiar with CIs. @pottekkat @shreemaan-abhishek @nic-6443

[zhoujiexiong]

Hi @yzeng25 , It seems that other test case unrelated fail the check, please help confirm.

Hi @yzeng25 , Still like that, unrelated.

Let's seek help from others who are more familiar with CIs. @pottekkat @shreemaan-abhishek @nic-6443

Checks had passed, reviewers are needed. :-)

[zhoujiexiong]

@shreemaan-abhishek @nic-6443

Hi Pals, One more reviewer needed, could you help?

Ping @yzeng25 :D