fix(pilota-thrift-parser): when parsing fields, all allowed whitespace locations need to be considered as non-newline comments

[Ggiggle]

Motivation

Thrift IDL like,

struct Val {
	1: string id  /** abc */ (go.tag="")
	2: string name
}

will encounter parser error, because we process blank just following the field ident incorrectly.

Solution

when parsing fields, all allowed whitespace locations need to be considered as non-newline comments

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.37%. Comparing base (8f44731) to head (250548d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #356      +/-   ##
==========================================
+ Coverage   66.32%   66.37%   +0.04%     
==========================================
  Files          88       88              
  Lines       24574    24574              
==========================================
+ Hits        16299    16310      +11     
+ Misses       8275     8264      -11     

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