doc: move perf tools and APIs to Tier 3

V8 CodeEventHandler, V8 CpuProfiler, Linux perf and the
`--interpreted-frames-native-stack`, `--prof` and `--prof-process` flags
satisfies our Diagnostics Support requirements for Tier 3. V8
CodeEventHandler and CpuProfiler are tested as part of our V8 CI, and
`Linux perf` / `--interpreted-frames-native-stack` are tested by
`test/v8-updates/test-linux-perf.js`. `--prof` and `--prof-process` are
tested in Node.js test suite.

PR-URL: #22915
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

Author: mmarchini

doc/guides/diagnostic-tooling-support-tiers.md

@@ -106,9 +106,13 @@ The tools are currently assigned to Tiers as follows:
 
 ## Tier 3
 
- | Tool Type | Tool/API Name             | Regular Testing in Node.js CI | Integrated with Node.js | Target Tier |
- |-----------|---------------------------|-------------------------------|-------------------------|-------------|
- |           |                           |                               |                         |             |
+ | Tool Type | Tool/API Name                        | Regular Testing in Node.js CI | Integrated with Node.js | Target Tier |
+ |-----------|--------------------------------------|-------------------------------|-------------------------|-------------|
+ | Profiling | V8 CPU profiler                      | Partial (V8 Tests)            | Yes                     |     1       |
+ | Profiling | --prof/--prof-process flags          | Yes                           | Yes                     |     1       |
+ | Profiling | V8 CodeEventHandler API              | Partial (V8 Tests)            | Yes                     |     2       |
+ | Profiling | V8 --interpreted-frames-native-stack | Yes                           | Yes                     |     2       |
+ | Profiling | Linux perf                           | Yes                           | Partial                 |     2       |
 
 ## Tier 4
 
@@ -136,10 +140,6 @@ The tools are currently assigned to Tiers as follows:
  | Tracing   | LTTng                     | No                            | Removed?                |     N/A     |
  | Tracing   | ETW                       | No                            | Partial                 |     3       |
  | Tracing   | Systemtap                 | No                            | Partial                 |     ?       |
- | Profiling | V8 CPU profiler  (--prof) | No                            | Yes                     |     1       |
- | Profiling | V8 CodeEventHandler API   | No                            | Yes                     |     ?       |
- | Profiling | V8 --interpreted-frames-native-stack | Yes                | Yes                     |     ?       |
- | Profiling | Linux perf                | Yes                           | Partial                 |     ?       |
  | Profiling | DTrace                    | No                            | Partial                 |     3       |
  | Profiling | Windows Xperf             | No                            | ?                       |     ?       |
  | Profiling | 0x                        | No                            | No                      |     4       |