Resolve HTTP Proxy parameters from the external configuration.

[maciejwalkowiak]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

Resolve HTTP Proxy parameters from the external configuration.

In order to make Proxy properties resolution in non-Spring Boot application the same as in Spring Boot application, the names of the environment variables had to be changed from ones in 1.7.x

• SENTRY_PROXY_HOST
• SENTRY_PROXY_PORT
• SENTRY_PROXY_USER
• SENTRY_PROXY_PASS

In addition to that - SentryOptions#proxy object had to be changed into Java bean so that we are able to bind properties via Spring Boot environment.

💡 Motivation and Context

Fixes #1028

💚 How did you test it?

Unit tests.

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• All tests passing
• No breaking changes

[marandaneto]

LGTM

[codecov-io]

Codecov Report

Merging #1035 (eb3276a) into main (296cc93) will decrease coverage by 0.00%.
The diff coverage is 73.52%.

@@             Coverage Diff              @@
##               main    #1035      +/-   ##
============================================
- Coverage     71.98%   71.98%   -0.01%     
- Complexity     1322     1336      +14     
============================================
  Files           135      138       +3     
  Lines          4816     4880      +64     
  Branches        492      499       +7     
============================================
+ Hits           3467     3513      +46     
- Misses         1091     1106      +15     
- Partials        258      261       +3     

Impacted Files	Coverage Δ	Complexity Δ
...java/io/sentry/transport/AuthenticatorWrapper.java	50.00% <50.00%> (ø)	2.00 <2.00> (?)
sentry/src/main/java/io/sentry/SentryOptions.java	79.82% <66.66%> (-1.95%)	92.00 <0.00> (+2.00)	⬇️
...n/java/io/sentry/transport/ProxyAuthenticator.java	66.66% <66.66%> (ø)	3.00 <3.00> (?)
...c/main/java/io/sentry/transport/HttpTransport.java	81.35% <86.95%> (+0.34%)	40.00 <3.00> (+5.00)
...main/java/io/sentry/config/PropertiesProvider.java	100.00% <100.00%> (ø)	2.00 <2.00> (?)

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[marandaneto]

@maciejwalkowiak this is ready to be merged, right? let's do it so we include it in the release next week.