Add support for HTTPS and H2C app protocols

[ItalyPaleAle]

This PR adds support to create a service that uses HTTPS (incl. HTTP/2) or H2C (HTTP/2 Cleartext). Using HTTP/2 should offer significant performance improvements, for example due to support for multiplexing.

1. New method http.NewServiceWithOptions which allows creating a service with options, including configuring the protocol explicitly ("https", "http", "h2c") and passing TLS certificates
2. If the env var APP_PROTOCOL (see Inject APP_PROTOCOL in app containers dapr#6512 and Add APP_PROTOCOL env var for app cli#1318) is present, uses that to detect HTTPS or H2C usage
3. If app protocol is HTTPS and no TLS certificates are passed, generates a self-signed cert automatically (they have validity of 1 year, but the expiration doesn't matter because Dapr doesn't validate TLS certificates)

[codecov]

Codecov Report

Patch coverage: 29.87% and project coverage change: -1.11% ⚠️

Comparison is base (5a105f0) 69.17% compared to head (c449cea) 68.07%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #420      +/-   ##
==========================================
- Coverage   69.17%   68.07%   -1.11%     
==========================================
  Files          34       34              
  Lines        2735     2800      +65     
==========================================
+ Hits         1892     1906      +14     
- Misses        734      784      +50     
- Partials      109      110       +1     

Files Changed	Coverage Δ
service/http/service.go	43.11% <29.87%> (-31.89%)	⬇️

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[daixiang0]

wait for related PRs merged.

[ItalyPaleAle]

wait for related PRs merged.

Which PR? The runtime features are merged

[yaron2]

validation isn't passing.

[ItalyPaleAle]

Can you re-trigger it please? It's been a while since it ran

[yaron2]

Doesn't seem to be a way to re-trigger.. i'll reopen.

[ItalyPaleAle]

Uhm I don't understand what's causing the tests to fail. Everything is working fine, but the failure is here:

https://github.com/ItalyPaleAle/dapr-go-sdk/blob/c449ceace2cc2a7520e411bb1ad04531d9b755f9/examples/service/README.md#L167

Which is trying to kill a process and it fails, after having already stopped Dapr?

(lsof -i:8080 | grep main) | awk '{print $2}' | xargs  kill

[tthophan]

Consider using http.NoBody or a more explicit timeout configuration if needed, but 30 * time.Second is acceptable for ReadHeaderTimeout as a baseline.