Add compatibility workflows and integration tests (#1991)

Fixes #1986
Fixes #1994

- Updated .gitignore to include SSL certificate files.
- Introduced new GitHub Actions workflows for testing compatibility with
Zabbix versions 5.0, 6.0, 7.0, and 7.2.
- Added integration tests for Zabbix API for each version, ensuring
proper authentication and API version handling.
- Updated Docker Compose files to support SSL configuration for Zabbix
web services.
- Removed deprecated default Docker Compose and bootstrap files.
- Removed devenv for version 6.2.

devenv/nginx/.htpasswd

@@ -0,0 +1 @@
+admin:$apr1$hosO.9ex$D2pmswVRynvDoLE.bYs2C.

devenv/nginx/default.conf

@@ -0,0 +1,29 @@
+server {
+  listen      80 default;
+  listen      443 ssl;
+  root        /var/www/html/;
+  index       index.php;
+
+  server_name                 localhost 127.0.0.1;
+  ssl_certificate           /etc/nginx/ssl/nginx.crt;
+  ssl_certificate_key   /etc/nginx/ssl/nginx.key;
+  ssl_protocols TLSv1.2 TLSv1.3;
+  ssl_ciphers HIGH:!aNULL:!MD5;
+
+  auth_basic           "Zabbix HTTP Auth";
+  auth_basic_user_file /etc/nginx/.htpasswd;
+
+  # Prevent caching of authentication
+  add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0";
+  add_header Pragma "no-cache";
+  add_header Expires "0";
+
+  location / {
+      proxy_pass       http://localhost:8080/;
+      proxy_set_header Host $http_host;
+      proxy_set_header X-Real-IP $remote_addr;
+      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+      proxy_set_header X-Forwarded-Proto $scheme;
+      proxy_buffering  on;
+  }
+}