Add request ID in log

[Aschen]

What does this PR do ?

Use the new AsyncLocalStorage of Node.js 14 to share a context between all the asynchronous calls for processing an API request.

If Kuzzle run with Node.js 12, a no-op class is used instead.

The performance overhead is 8%

----	Log with AsyncLocalStorage	Log classic	difference
req/s	2613	2842	8%

Complete benchmark details

# server:now
  /**
   * @returns {Promise<Object>}
   */
  async now () {
    this.kuzzle.log.info('ASL FTW');

    return { now: Date.now() };
  }

Benchmark with wrk and NODE_ENV=production

# With AsyncLocalStorage

$ wrk -t12 -c300 -d30s http://localhost:7512/_now
Running 30s test @ http://localhost:7512/_now
  12 threads and 300 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   119.06ms   53.96ms 659.90ms   94.74%
    Req/Sec   230.42     51.60   300.00     87.08%
  78675 requests in 30.10s, 46.67MB read
Requests/sec:   2613.86
Transfer/sec:      1.55MB

# Without AsyncLocalStorage

$ wrk -t12 -c300 -d30s http://localhost:7512/_now
Running 30s test @ http://localhost:7512/_now
  12 threads and 300 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   105.60ms   30.22ms 301.36ms   85.67%
    Req/Sec   244.67     84.32   505.00     74.93%
  85509 requests in 30.08s, 50.72MB read
Requests/sec:   2842.67
Transfer/sec:      1.69MB

How should this be manually tested?

• Step 1 :
• Step 2 :
• Step 3 :
  ...

Other changes

Boyscout

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

0.0% Coverage
0.1% Duplication

[codecov]

Codecov Report

Merging #1604 into 2-dev will decrease coverage by 0.00%.
The diff coverage is 90.47%.

@@            Coverage Diff             @@
##            2-dev    #1604      +/-   ##
==========================================
- Coverage   93.52%   93.51%   -0.01%     
==========================================
  Files         113      114       +1     
  Lines        7197     7221      +24     
==========================================
+ Hits         6731     6753      +22     
- Misses        466      468       +2     

Impacted Files	Coverage Δ
lib/kuzzle/log.js	69.23% <42.85%> (-8.55%)	⬇️
lib/api/funnel.js	96.64% <100.00%> (+0.02%)	⬆️
lib/kuzzle/kuzzle.js	95.78% <100.00%> (+0.09%)	⬆️
lib/util/asyncStore.js	100.00% <100.00%> (ø)

---

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

0.0% Coverage
0.1% Duplication

[Aschen]

@Leodau You may want to review this PR again