td-agent 4.4.2 for macOS x86_64 lacks libyaml

It's originally reported by @dferreiralopessc at Slack.

Although fluentd 1.15 requires libyaml mandatory but td-agent for macOS x86_64 lacks it:

```
sudo /opt/td-agent/usr/sbin/td-agent
Traceback (most recent call last):
24: from /opt/td-agent/usr/sbin/td-agent:15:in `'
23: from /opt/td-agent/usr/sbin/td-agent:15:in `load'
22: from /opt/td-agent/bin/fluentd:23:in `'
21: from /opt/td-agent/bin/fluentd:23:in `load'
20: from /opt/td-agent/lib/ruby/gems/2.7.0/gems/fluentd-1.15.3/bin/fluentd:15:in `'
19: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
18: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
17: from /opt/td-agent/lib/ruby/gems/2.7.0/gems/fluentd-1.15.3/lib/fluent/command/fluentd.rb:19:in `'
16: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
15: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
14: from /opt/td-agent/lib/ruby/gems/2.7.0/gems/fluentd-1.15.3/lib/fluent/supervisor.rb:21:in `'
13: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
12: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
11: from /opt/td-agent/lib/ruby/gems/2.7.0/gems/fluentd-1.15.3/lib/fluent/config.rb:20:in `'
10: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
9: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
8: from /opt/td-agent/lib/ruby/gems/2.7.0/gems/fluentd-1.15.3/lib/fluent/config/yaml_parser.rb:17:in `'
7: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
6: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
5: from /opt/td-agent/lib/ruby/gems/2.7.0/gems/fluentd-1.15.3/lib/fluent/config/yaml_parser/loader.rb:17:in `'
4: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
3: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
2: from /opt/td-agent/lib/ruby/2.7.0/psych.rb:13:in `'
1: from /opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
/opt/td-agent/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require': dlopen(/opt/td-agent/lib/ruby/2.7.0/x86_64-darwin20/psych.bundle, 0x0009): Library not loaded: /usr/local/opt/libyaml/lib/libyaml-0.2.dylib (LoadError)
Referenced from: <35E2A478-8DE6-37F5-B116-40F99453B946> /opt/td-agent/lib/ruby/2.7.0/x86_64-darwin20/psych.bundle
Reason: tried: '/usr/local/opt/libyaml/lib/libyaml-0.2.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/usr/local/opt/libyaml/lib/libyaml-0.2.dylib' (no such file), '/usr/local/opt/libyaml/lib/libyaml-0.2.dylib' (no such file), '/usr/local/lib/libyaml-0.2.dylib' (no such file), '/usr/lib/libyaml-0.2.dylib' (no such file, not in dyld cache) - /opt/td-agent/lib/ruby/2.7.0/x86_64-darwin20/psych.bundle
```

On my environment, it uses Homebrew's one:
```
iMac5k-211:td-agent aho$ otool -L /opt/td-agent/lib/ruby/2.7.0/x86_64-darwin20/psych.bundle
/opt/td-agent/lib/ruby/2.7.0/x86_64-darwin20/psych.bundle:
/opt/td-agent/lib/libruby.2.7.dylib (compatibility version 2.7.0, current version 2.7.6)
/usr/local/opt/libyaml/lib/libyaml-0.2.dylib (compatibility version 3.0.0, current version 3.9.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1311.0.0)
```

td-agent for macOS arm64 doesn't have this issue since it uses built-in libyaml:
```
aho@M1-Mac-mini td-agent % otool -L /opt/td-agent/lib/ruby/2.7.0/arm64-darwin21/psych.bundle
/opt/td-agent/lib/ruby/2.7.0/arm64-darwin21/psych.bundle:
/opt/td-agent/lib/libruby.2.7.dylib (compatibility version 2.7.0, current version 2.7.6)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1311.100.3)
```

We should rebuild ruby with built-in libyaml on x86_64 too.

Iniziare esaminando la configurazione di build di Ruby per macOS x86_64 che produce psych.bundle, quindi confrontare la relativa dipendenza con la build arm64 mostrata da otool. Ricompilare il pacchetto Ruby x86_64 in modo che psych.bundle utilizzi il libyaml integrato, verificare con otool che non faccia più riferimento a /usr/local/opt/libyaml e confermare che /opt/td-agent/usr/sbin/td-agent si avvii correttamente.

Scritto dal modello di indicizzazione a partire dal testo della issue.