feat: support bundle updates to enable pprof and telemetry collection (#21486)

- Adds pprof collection support now that we have the listeners
automatically starting (requires Coder server 2.28.0+, includes a
version check). Collects heap, allocs, profile (30s), block, mutex,
goroutine, threadcreate, trace (30s), cmdline, symbol. Performs capture
for 30 seconds and emits a log line stating as such. Enable capture by
supplying the `--pprof` flag or `CODER_SUPPORT_BUNDLE_PPROF` env var.
Collection of pprof data from both coderd and the Coder agent occurs.
- Adds collection of Prometheus metrics, also requires 2.28.0+
- Adds the ability to include a template in the bundle independently of
supplying the details of a running workspace by supplying the
`--template` flag or `CODER_SUPPORT_BUNDLE_TEMPLATE` env var
- Captures a list of workspaces the user has access to. Defaults to a
max of 10, configurable via `--workspaces-total-cap` /
`CODER_SUPPORT_BUNDLE_WORKSPACES_TOTAL_CAP`
- Collects additional stats from the coderd deployment (aggregated
workspace/session metrics), as well as entitlements via license and
dismissed health checks.

created with help from mux

docs/reference/cli/support_bundle.md

@@ -42,3 +42,30 @@ File path for writing the generated support bundle. Defaults to coder-support-$(
 | Environment | <code>$CODER_SUPPORT_BUNDLE_URL_OVERRIDE</code> |
 
 Override the URL to your Coder deployment. This may be useful, for example, if you need to troubleshoot a specific Coder replica.
+
+### --workspaces-total-cap
+
+|             |                                                         |
+|-------------|---------------------------------------------------------|
+| Type        | <code>int</code>                                        |
+| Environment | <code>$CODER_SUPPORT_BUNDLE_WORKSPACES_TOTAL_CAP</code> |
+
+Maximum number of workspaces to include in the support bundle. Set to 0 or negative value to disable the cap. Defaults to 10.
+
+### --template
+
+|             |                                             |
+|-------------|---------------------------------------------|
+| Type        | <code>string</code>                         |
+| Environment | <code>$CODER_SUPPORT_BUNDLE_TEMPLATE</code> |
+
+Template name to include in the support bundle. Use org_name/template_name if template name is reused across multiple organizations.
+
+### --pprof
+
+|             |                                          |
+|-------------|------------------------------------------|
+| Type        | <code>bool</code>                        |
+| Environment | <code>$CODER_SUPPORT_BUNDLE_PPROF</code> |
+
+Collect pprof profiling data from the Coder server and agent. Requires Coder server version 2.28.0 or newer.