[C][Client] Disable escaping the parameter name in URL path string

[ityuhui]

When the path parameter name is a C/C++ keyword, e.g. namespace, the generated code will escape the parameter name, e.g. _namespace:

    snprintf(localVarPath, sizeOfPath, "/apis/apps/v1/namespaces/{namespace}/controllerrevisions");

    // Path Params
    long sizeOfPathParams__namespace = strlen(_namespace)+3 + strlen("{ _namespace }");
...
    char* localVarToReplace__namespace = malloc(sizeOfPathParams__namespace);
    sprintf(localVarToReplace__namespace, "{%s}", "_namespace");   //<--- This is not right, {_namespace} cannot replace namespace in localVarPath "/apis/apps/v1/namespaces/{namespace}/controllerrevisions"

    localVarPath = strReplace(localVarPath, localVarToReplace__namespace, _namespace);

The {_namespace} in localVarToReplace__namespace should not be escaped, it should be {namespace}, then it can be used to replace in localVarPath "/apis/apps/v1/namespaces/{namespace}/controllerrevisions"

So this PR will disable escaping the parameter name in URL path string.

This PR relays the PR #8205

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@wing328 @zhemant @michelealbano

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[wing328]

@ityuhui thanks for the fix. CI failure not related to this PR.

[ityuhui]

Thanks @wing328

And because this PR has been merged, another PR #8205 can be merged too.