Drop unreleased features (record & replay)

[life1347]

1. The records are stored in redis which is not migratable to another cluster for the testing purposes.
2. Some of the requests fields are not recorded.
3. People should consider using https://github.com/buger/goreplay which is an existing mature and well-tested solution for testing purposes.

This change is 

[codecov]

Codecov Report

Merging #1406 into master will increase coverage by 1.04%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master    #1406      +/-   ##
==========================================
+ Coverage   30.96%   32.01%   +1.04%     
==========================================
  Files          75       68       -7     
  Lines        5903     5488     -415     
==========================================
- Hits         1828     1757      -71     
+ Misses       3836     3496     -340     
+ Partials      239      235       -4

Impacted Files	Coverage Δ
pkg/router/requesthHeader.go	80% <ø> (+15.71%)	⬆️
pkg/router/functionHandler.go	37.76% <ø> (+2.24%)	⬆️
pkg/crd/crd.go	93.18% <ø> (-0.66%)	⬇️
pkg/crd/client.go	65.9% <ø> (-0.76%)	⬇️
pkg/controller/api.go	67.13% <ø> (-2.15%)	⬇️
pkg/router/router.go	11.57% <0%> (+0.18%)	⬆️
pkg/router/httpTriggers.go	31.01% <100%> (+0.28%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1cda7e0...a0ad719. Read the comment docs.