[7.x] [build] rewrite source as transpiled JS later in the process (#73749)

[spalger]

Backports the following commits to 7.x:

• [build] rewrite source as transpiled JS later in the process ([build] rewrite source as transpiled JS later in the process #73749)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: b895002

Build metrics

@kbn/optimizer bundle module count

id	value	diff	baseline
advancedSettings	53	+30	23
alerts	25	+3	22
apm	941	+292	649
apmOss	6	+2	4
beats_management	307	+74	233
bfetch	20	+7	13
canvas	1317	+434	883
charts	268	+109	159
cloud	6	+2	4
console	159	+122	37
core	562	+128	434
crossClusterReplication	163	+103	60
dashboard	173	+59	114
dashboardEnhanced	28	+22	6
dashboardMode	7	+2	5
data	539	+276	263
dataEnhanced	18	+13	5
devTools	20	+3	17
discover	248	+136	112
discoverEnhanced	11	+9	2
embeddable	71	+31	40
embeddableEnhanced	10	+7	3
enterpriseSearch	166	+55	111
esUiShared	226	+49	177
expressions	108	+7	101
features	9	+3	6
fileUpload	28	+14	14
globalSearch	22	+6	16
globalSearchProviders	8	+5	3
graph	160	+64	96
grokdebugger	39	+28	11
home	207	+44	163
indexLifecycleManagement	178	+86	92
indexManagement	499	+320	179
indexPatternManagement	193	+145	48
infra	1054	+396	658
ingestManager	517	+154	363
ingestPipelines	368	+101	267
inputControlVis	44	+28	16
inspector	67	+18	49
kibanaLegacy	133	+38	95
kibanaReact	283	+38	245
kibanaUtils	190	+32	158
lens	253	+112	141
licenseManagement	145	+50	95
licensing	10	+2	8
lists	123	+22	101
logstash	195	+46	149
management	45	+20	25
maps	764	+340	424
mapsLegacy	140	+18	122
mapsLegacyLicensing	4	+2	2
ml	1222	+831	391
monitoring	615	+340	275
navigation	26	+7	19
newsfeed	10	+7	3
observability	95	+52	43
painlessLab	44	+26	18
regionMap	251	+93	158
remoteClusters	145	+79	66
reporting	44	+25	19
rollup	183	+114	69
savedObjects	48	+25	23
savedObjectsManagement	119	+46	73
searchprofiler	76	+47	29
security	453	+189	264
securitySolution	2033	+968	1065
share	38	+11	27
snapshotRestore	168	+135	33
spaces	192	+74	118
telemetry	23	+12	11
telemetryManagementSection	8	+4	4
tileMap	257	+97	160
timelion	105	+46	59
transform	318	+160	158
triggers_actions_ui	224	+73	151
uiActions	29	+9	20
uiActionsEnhanced	62	+34	28
upgradeAssistant	120	+36	84
uptime	500	+251	249
usageCollection	17	+14	3
visTypeMarkdown	256	+90	166
visTypeMetric	258	+92	166
visTypeTable	277	+106	171
visTypeTagcloud	261	+93	168
visTypeTimelion	280	+104	176
visTypeTimeseries	469	+142	327
visTypeVega	311	+114	197
visTypeVislib	507	+211	296
visTypeXy	4	+2	2
visualizations	134	+57	77
visualize	308	+107	201
watcher	228	+121	107
total	-	+9151	-

async chunks size

id	value	diff	baseline
apm	3.7MB	-7.9KB	3.7MB
canvas	1.5MB	-6.0B	1.5MB
console	1.1MB	-138.0B	1.1MB
discover	430.2KB	-702.0B	430.9KB
graph	1.4MB	-13.0B	1.4MB
home	510.5KB	-12.0B	510.5KB
infra	3.6MB	+56.0B	3.6MB
monitoring	1.1MB	+62.0B	1.1MB
observability	311.8KB	+20.0B	311.7KB
savedObjectsManagement	168.9KB	+31.0B	168.9KB
securitySolution	7.3MB	+41.0B	7.3MB
upgradeAssistant	331.5KB	+40.0B	331.5KB
uptime	620.3KB	+5.0B	620.3KB
visTypeTimeseries	1.8MB	-2.8KB	1.8MB
visualize	677.3KB	+5.0B	677.3KB
watcher	604.2KB	+4.1KB	600.0KB
total	-	-7.1KB	-

page load bundle size

id	value	diff	baseline
apmOss	3.9KB	-301.0B	4.2KB
beats_management	580.6KB	+24.0B	580.6KB
bfetch	26.2KB	-1.8KB	28.0KB
canvas	1.4MB	+16.0B	1.4MB
charts	873.8KB	-251.0B	874.0KB
core	1.2MB	+17.1KB	1.1MB
dashboard	678.0KB	-1.7KB	679.7KB
data	1.4MB	-40.7KB	1.4MB
esUiShared	987.3KB	-22.2KB	1009.5KB
expressions	347.5KB	+3.7KB	343.8KB
home	24.0KB	-1.9KB	25.9KB
inspector	278.4KB	-782.0B	279.2KB
kibanaLegacy	247.2KB	+46.0B	247.2KB
kibanaUtils	467.9KB	-1.5KB	469.4KB
lens	841.0KB	+16.0B	840.9KB
ml	4.3MB	+16.0B	4.3MB
newsfeed	21.8KB	-871.0B	22.7KB
savedObjects	237.3KB	-357.0B	237.7KB
savedObjectsManagement	216.4KB	-570.0B	217.0KB
share	80.0KB	-1000.0B	81.0KB
telemetry	73.9KB	-2.0KB	75.9KB
upgradeAssistant	56.8KB	+4.9KB	51.9KB
visTypeTimelion	711.8KB	-1.1KB	712.9KB
visTypeTimeseries	280.3KB	-274.0B	280.6KB
visTypeVislib	1.3MB	-345.0B	1.3MB
visualizations	408.2KB	-263.0B	408.5KB
total	-	-51.8KB	-

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream