Configurable HTTP redirect following

[guillempages]

What does this implement/fix?

Add the possibility to configuring "follow redirects" for HTTP requests.

In my setup, I am doing a HTTP request to an apache virtual host and it sends a redirect response (HTTP code: 300).
In order for the request to actually succeed, the "FOLLOW_REDIRECTS" option needs to be set to the HTTPClient instance.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other

Related issue or feature (if applicable): fixes
No issue (that I am aware of). If needed I can create one.

Pull request in esphome-docs with documentation (if applicable): esphome/esphome-docs#1839

Test Environment

• ESP32 (inkplate 10)
• ESP32 IDF
• ESP8266

Example entry for config.yaml:

http_request:
  follow_redirects: true
  redirect_limit: 15

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in esphome-docs.

[oxan]

Two minor nits, looks good otherwise.

[oxan]

Thanks!