Datadog: value can now return "TF"

What changed

Producer-side tools call this additive. It breaks exhaustive switches, strict parsers and generated client enums.

Affects this value on IssueLanguage reachable from 4 operations.

New value: TF.

can now return "TF"

Code that reads Datadog's IssueLanguage objects, used by 4 Datadog operations.

Where	Before	After
IssueLanguage	"BRIGHTSCRIPT", "C", "CLOJURE", "C_PLUS_PLUS", "C_SHARP", "DOT_NET", "ELIXIR", "ERLANG", "GO", "GROOVY", "HASKELL", "HCL", "JAVA", "JAVASCRIPT", "JVM", "KOTLIN", "OBJECTIVE_C", "PERL", "PHP", "PYTHON", "RUBY", "RUST", "SCALA", "SWIFT", "TERRAFORM", "TYPESCRIPT", "UNKNOWN"	"BRIGHTSCRIPT", "C", "CLOJURE", "C_PLUS_PLUS", "C_SHARP", "DOT_NET", "ELIXIR", "ERLANG", "GO", "GROOVY", "HASKELL", "HCL", "JAVA", "JAVASCRIPT", "JVM", "KOTLIN", "OBJECTIVE_C", "PERL", "PHP", "PYTHON", "RUBY", "RUST", "SCALA", "SWIFT", "TERRAFORM", "TF", "TYPESCRIPT", "UNKNOWN"

switch (response) {
  // existing branches …
  // no branch for "TF"
  default:
    throw new Error("unexpected value");
}

Based on Datadog’s published API specification. How severity is decided.