apiclient: fix http roundtrip (clone body also)

[he2ss]

This pr allows to retry properly the HTTP request when it receives a 401 HTTP code including the request body.

[codecov-commenter]

Codecov Report

Merging #1758 (8130698) into master (fe23da6) will increase coverage by 0.03%. The diff coverage is 93.75%.

@@            Coverage Diff             @@
##           master    #1758      +/-   ##
==========================================
+ Coverage   53.73%   53.77%   +0.03%     
==========================================
  Files         151      151              
  Lines       20280    20301      +21     
==========================================
+ Hits        10898    10917      +19     
- Misses       8205     8206       +1     
- Partials     1177     1178       +1     

Flag	Coverage Δ
func-crowdsec	47.07% <ø> (ø)
func-cscli	44.57% <ø> (-0.05%)	:arrow_down:
unit-linux	58.37% <93.75%> (+0.15%)	:arrow_up:
unit-windows	53.41% <93.75%> (-0.08%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/apiclient/auth.go	78.31% <93.54%> (-0.46%)	:arrow_down:
pkg/apiclient/client.go	77.31% <100.00%> (+0.23%)	:arrow_up:
cmd/crowdsec-cli/machines.go	50.17% <0.00%> (-1.07%)	:arrow_down:
pkg/acquisition/modules/docker/docker.go	61.51% <0.00%> (+0.24%)	:arrow_up:
pkg/acquisition/modules/cloudwatch/cloudwatch.go	78.82% <0.00%> (+0.98%)	:arrow_up:

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[sabban]

Need a fix server side too

[he2ss]

The PR is ready, the server side fixed is done.

[LaurenceJJones]

/kind enhancement /area agent

[he2ss]

Before merging, we need to test this behavior,

Having LAPI and agent separated then, restart LAPI and check if the agent can send a heartbeat.

[he2ss]

Before merging, we need to test this behavior,

Having LAPI and agent separated then, restart LAPI and check if the agent can send a heartbeat.

Tested,

INFO[12-12-2022 14:11:35] 127.0.0.1 - [Mon, 12 Dec 2022 14:11:35 CET] "GET /v1/heartbeat HTTP/1.1 401 91.671µs "crowdsec/v1.4.3-linux-9e6781aad2acc249e875e5dc64fd52d0cf9f842d" " 
INFO[12-12-2022 14:11:35] 127.0.0.1 - [Mon, 12 Dec 2022 14:11:35 CET] "POST /v1/watchers/login HTTP/1.1 200 63.247137ms "crowdsec/v1.4.3-linux-9e6781aad2acc249e875e5dc64fd52d0cf9f842d" " 
INFO[12-12-2022 14:11:35] 127.0.0.1 - [Mon, 12 Dec 2022 14:11:35 CET] "GET /v1/heartbeat HTTP/1.1 200 5.105604ms "crowdsec/v1.4.3-linux-9e6781aad2acc249e875e5dc64fd52d0cf9f842d" " 
INFO[12-12-2022 14:12:35] 127.0.0.1 - [Mon, 12 Dec 2022 14:12:35 CET] "GET /v1/heartbeat HTTP/1.1 200 20.727092ms "crowdsec/v1.4.3-linux-9e6781aad2acc249e875e5dc64fd52d0cf9f842d" "

It works fine.