Feature: Add web_config to blackbox_exporter

[jadyndev]

This adds the web_config option from roles/prometheus to roles/blackbox_exporter

[Wesley1999git]

@jadyndev

Could you provide an estimation of when this PR will be merged? We are eager to use this exporter, and we would like to configure the TLS in the same way we do for all the other exporters.

[jadyndev]

@Wesley1999git As the changes have been shown to be stable I'll remove the WIP flag.
I'll resolve the conflict, then we can merge.

[gardar]

Could you please rebase this now that we've offloaded a lot of tasks over to the _common role. See #425

[github-actions]

Docs Build 📝

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The docs for this PR have been published here:
https://prometheus-community.github.io/ansible/pr/207

You can compare to the docs for the main branch here:
https://prometheus-community.github.io/ansible/branch/main

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File changes:

• M blackbox_exporter_role.html

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diff --git a/home/runner/work/ansible/ansible/docsbuild/base/blackbox_exporter_role.html b/home/runner/work/ansible/ansible/docsbuild/head/blackbox_exporter_role.html
index 86c78f4..9857a48 100644
--- a/home/runner/work/ansible/ansible/docsbuild/base/blackbox_exporter_role.html
+++ b/home/runner/work/ansible/ansible/docsbuild/head/blackbox_exporter_role.html
@@ -254,6 +254,13 @@ To check whether it is installed, run <code class="code docutils literal notrans
 </div></td>
 </tr>
 <tr class="row-even"><td><div class="ansible-option-cell">
+<div class="ansibleOptionAnchor" id="parameter-main--blackbox_exporter_web_config"></div><p class="ansible-option-title" id="ansible-collections-prometheus-prometheus-blackbox-exporter-role-parameter-main-blackbox-exporter-web-config"><strong>blackbox_exporter_web_config</strong></p>
+<a class="ansibleOptionLink" href="#parameter-main--blackbox_exporter_web_config" title="Permalink to this option"></a><p class="ansible-option-type-line"><span class="ansible-option-type">dictionary</span></p>
+</div></td>
+<td><div class="ansible-option-cell"><p>A Prometheus <a class="reference external" href="https://github.com/prometheus/exporter-toolkit/blob/master/docs/web-configuration.md">web config yaml</a> for configuring TLS and auth.</p>
+</div></td>
+</tr>
+<tr class="row-odd"><td><div class="ansible-option-cell">
 <div class="ansibleOptionAnchor" id="parameter-main--blackbox_exporter_web_listen_address"></div><p class="ansible-option-title" id="ansible-collections-prometheus-prometheus-blackbox-exporter-role-parameter-main-blackbox-exporter-web-listen-address"><strong>blackbox_exporter_web_listen_address</strong></p>
 <a class="ansibleOptionLink" href="#parameter-main--blackbox_exporter_web_listen_address" title="Permalink to this option"></a><p class="ansible-option-type-line"><span class="ansible-option-type">string</span></p>
 </div></td>

[gardar]

Could you please also add configuration for the web_config to the molecule tests?
You can take a look at how we test it any of the other roles, such as the bind_exporter:

ansible/roles/bind_exporter/molecule/alternative/molecule.yml

Lines 16 to 22 in f3514a9

	bind_exporter_tls_server_config:
	cert_file: /etc/bind_exporter/tls.cert
	key_file: /etc/bind_exporter/tls.key
	bind_exporter_http_server_config:
	http2: true
	bind_exporter_basic_auth_users:
	randomuser: examplepassword