Xml parser

[armstrmi]

Description of Changes

• Added XML-Parser Operator

Please check that the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• Add a changelog entry (for non-trivial bug fixes / features)
• CI passes

[djaglowski]

Log Files	Logs / Second	CPU Avg (%)	CPU Avg Δ (%)	Memory Avg (MB)	Memory Avg Δ (MB)
1	1000	1.6207191	+0.1551708	128.4414	-2.9709015
1	5000	5.000051	-0.12074661	139.17107	+2.7522888
1	10000	10.500242	-0.017010689	146.82246	+2.8048248
1	50000	53.10463	+0.43157196	185.60196	-2.3525085
1	100000	94.29444	-7.467308	229.92148	-8.571518
10	100	1.9828066	-0.03447044	132.75592	-2.059143
10	500	6.034547	-0.24157238	138.757	-0.33499146
10	1000	12.086316	-2.34513	150.76791	-1.0187225
10	5000	56.932384	-2.0277252	184.24986	+1.812088
10	10000	108.70068	-9.318306	231.30307	-8.309814

[codecov]

Codecov Report

Merging #482 (279040b) into master (adad941) will increase coverage by 0.21%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #482      +/-   ##
==========================================
+ Coverage   73.96%   74.17%   +0.21%     
==========================================
  Files         126      128       +2     
  Lines        8137     8219      +82     
==========================================
+ Hits         6018     6096      +78     
- Misses       1616     1623       +7     
+ Partials      503      500       -3     

Impacted Files	Coverage Δ
operator/builtin/parser/xml/element.go	100.00% <100.00%> (ø)
operator/builtin/parser/xml/xml.go	100.00% <100.00%> (ø)
operator/builtin/input/file/file.go	77.16% <0.00%> (-1.52%)	⬇️
operator/builtin/output/forward/forward.go	60.49% <0.00%> (-1.23%)	⬇️

---

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[djaglowski]

Log Files	Logs / Second	CPU Avg (%)	CPU Avg Δ (%)	Memory Avg (MB)	Memory Avg Δ (MB)
1	1000	1.6897098	+0.2241615	129.47293	-1.9393768
1	5000	5.1208196	+2.193451e-05	136.95757	+0.53878784
1	10000	11.05178	+0.5345268	150.07193	+6.054291
1	50000	55.468185	+2.7951279	187.01576	-0.93870544
1	100000	90.98508	-10.776672	243.44464	+4.951645
10	100	2.0172126	-6.4373016e-05	134.90814	+0.09307861
10	500	6.103358	-0.17276144	139.87944	+0.78744507
10	1000	12.448761	-1.9826851	151.32611	-0.4605255
10	5000	55.27694	-3.6831703	189.75539	+7.3176117
10	10000	109.36464	-8.65435	234.41136	-5.201523

[djaglowski]

Log Files	Logs / Second	CPU Avg (%)	CPU Avg Δ (%)	Memory Avg (MB)	Memory Avg Δ (MB)
1	1000	1.4655347	-1.3589859e-05	129.52478	-1.8875275
1	5000	5.189648	+0.06885052	139.10062	+2.681839
1	10000	10.465566	-0.05168724	146.9014	+2.8837585
1	50000	55.294525	+2.6214676	182.17888	-5.775589
1	100000	110.2907	+8.528954	247.59995	+9.106949
10	100	1.9138235	-0.10345352	133.69127	-1.1237946
10	500	6.15529	-0.120829105	142.91083	+3.8188324
10	1000	12.62104	-1.8104057	152.05563	+0.2689972
10	5000	61.46718	+2.5070686	183.93184	+1.4940643
10	10000	109.101654	-8.9173355	240.70273	+1.0898438

[djaglowski]

Log Files	Logs / Second	CPU Avg (%)	CPU Avg Δ (%)	Memory Avg (MB)	Memory Avg Δ (MB)
1	1000	1.5000672	+0.034518957	132.33473	+0.9224243
1	5000	5.189679	+0.06888151	136.73398	+0.3152008
1	10000	10.638039	+0.12078571	147.65382	+3.6361847
1	50000	53.122055	+0.4489975	180.34698	-7.607483
1	100000	109.94719	+8.18544	254.67377	+16.18077
10	100	2.0000134	-0.01726365	132.34119	-2.473877
10	500	6.41397	+0.13785076	139.91002	+0.8180237
10	1000	11.845333	-2.586113	149.12648	-2.6601562
10	5000	59.03499	+0.07487869	180.44208	-1.995697
10	10000	103.510765	-14.5082245	231.55994	-8.052948

[djaglowski]

Log Files	Logs / Second	CPU Avg (%)	CPU Avg Δ (%)	Memory Avg (MB)	Memory Avg Δ (MB)
1	1000	1.4655479	-3.5762787e-07	130.8416	-0.5707092
1	5000	5.2932386	+0.172441	139.69788	+3.2790985
1	10000	10.569209	+0.051956177	150.0361	+6.018463
1	50000	52.863457	+0.19039917	182.21593	-5.7385406
1	100000	98.67286	-3.08889	232.35358	-6.1394196
10	100	1.9655595	-0.05171752	131.63524	-3.1798248
10	500	6.2070894	-0.06902981	139.77815	+0.6861572
10	1000	11.758739	-2.6727066	149.59119	-2.1954498
10	5000	56.0153	-2.944809	180.21889	-2.2188873
10	10000	113.70606	-4.3129272	240.48477	+0.8718872