ci: Remove benchmarks-matrix, recommend gh workflow run (#19677)

Author: carsonip

.github/workflows/benchmarks-matrix.yml

@@ -2,6 +2,8 @@ name: benchmarks
 
 # Secret access requires allowlist in https://github.com/elastic/oblt-infra/tree/main/conf/resources/repos/apm-server
 
+# To call benchmarks workflow programmatically with different params, use the `gh workflow run` command.
+
 on:
   workflow_dispatch:
     inputs:
@@ -55,60 +57,6 @@ on:
         required: false
         type: boolean
         default: false
-  workflow_call:
-    # Identical to workflow_dispatch inputs
-    # GH Actions YAML parser doesn't support anchors yet: https://github.com/actions/runner/issues/1182
-    inputs:
-      runStandalone:
-        description: 'Benchmark against standalone APM Server with Moxy'
-        required: false
-        type: boolean
-        default: false
-      enableTailSampling:
-        description: 'Enable tail-based sampling on APM server'
-        required: false
-        type: boolean
-        default: false
-      tailSamplingStorageLimit:
-        description: 'Storage size limit of tail-based sampling on APM server'
-        required: false
-        type: string
-        default: "10GB"
-      tailSamplingSampleRate:
-        description: 'Blanket sample rate used by tail-based sampling'
-        required: false
-        type: string
-        default: "0.1"
-      profile:
-        description: 'System profile for benchmark, e.g. system-profiles/8GBx1zone.tfvars'
-        required: false
-        type: string
-        # defaults set below (TFVARS_SOURCE)
-      runOnStable:
-        description: 'Benchmark on latest stable version instead of a build from commit'
-        required: false
-        type: boolean
-        default: false
-      benchmarkAgents:
-        description: 'Number of benchmark agents sending data to APM Server'
-        required: false
-        type: string
-        # defaults set in Makefile
-      benchmarkRun:
-        description: 'Benchmark scenarios that only match regex, e.g. BenchmarkAgentAll'
-        required: false
-        type: string
-        # defaults set in Makefile
-      warmupTime:
-        description: 'Benchmark warmup time for APM Server e.g. 3s, 5m, 2h'
-        required: false
-        type: string
-        # defaults set below (Set up env)
-      pgoExport:
-        description: 'Benchmark with PGO export'
-        required: false
-        type: boolean
-        default: false
   schedule:
     - cron: '0 17 * * *' # Scheduled regular benchmarks.
     - cron: '0 0 1 * *' # Scheduled PGO benchmarks.