[9.0] move language examples to a separate file (#4910)

[pquentin]

Backport

This will backport the following commits from main to 9.0:

• move language examples to a separate file (#4910)

Questions ?

Please refer to the Backport tool documentation

[github-actions]

Following you can find the validation changes against the target branch for the APIs.

API	Status	Request	Response
cat.indices	🟢	34/34 → 33/33	33/33 → 32/32
cat.shards	🟢	16/16 → 11/11	16/16 → 11/11
cluster.allocation_explain	🟢	6/6 → 4/4	6/6 → 4/4
cluster.health	🟢	207/207 → 162/162	207/207 → 162/162
cluster.put_component_template	🔴	32/36 → 23/29	36/36 → 29/29
cluster.put_settings	🟢	62/62 → 59/59	61/61 → 58/58
cluster.state	🟢	83/83 → 79/79	82/82 → 78/78
esql.query	🟢	323/323 → 286/286	0/0
ilm.explain_lifecycle	🔴 → 🟢	5/5	4/5 → 5/5
indices.add_block	🟢	3/3 → 2/2	3/3 → 2/2
indices.close	🟢	51/51 → 49/49	51/51 → 49/49
indices.create	🔴	1302/1336 → 1167/1212	1336/1336 → 1212/1212
indices.create_data_stream	🟢	118/118 → 31/31	118/118 → 31/31
indices.data_streams_stats	🟢	9/9 → 4/4	9/9 → 4/4
indices.delete	🟢	114/114 → 105/105	114/114 → 105/105
indices.delete_data_lifecycle	🟢 → ⚪	2/2 → Missing test	2/2 → Missing test
indices.delete_data_stream	🟢	96/96 → 28/28	96/96 → 28/28
indices.delete_index_template	🟢	7/7 → 1/1	7/7 → 1/1
indices.downsample	🟢	4/4 → 2/2	4/4 → 2/2
indices.exists	🟢	44/44 → 39/39	44/44 → 39/39
indices.explain_data_lifecycle	🔴 → ⚪	3/3 → Missing test	0/3 → Missing test
indices.flush	🟢	50/50 → 41/41	50/50 → 41/41
indices.forcemerge	🟢	14/14 → 12/12	14/14 → 12/12
indices.get	🟢	66/66 → 55/55	66/66 → 55/55
indices.get_alias	🟢	75/75 → 68/68	75/75 → 68/68
indices.get_data_lifecycle	🔴 → ⚪	14/14 → Missing test	1/14 → Missing test
indices.get_data_stream	🔴 → 🟢	119/119 → 11/11	75/119 → 11/11
indices.get_field_mapping	🟢	26/26 → 15/15	26/26 → 15/15
indices.get_mapping	🔴	213/213 → 145/145	203/213 → 141/145
indices.get_settings	🔴	84/84 → 76/76	65/84 → 57/76
indices.migrate_to_data_stream	🟢 → ⚪	1/1 → Missing test	1/1 → Missing test
indices.modify_data_stream	🔴 → ⚪	3/7 → Missing test	7/7 → Missing test
indices.open	🟢	21/21 → 20/20	21/21 → 20/20
indices.put_alias	🔴	60/60 → 59/59	20/60 → 20/59
indices.put_data_lifecycle	🔴 → ⚪	5/6 → Missing test	6/6 → Missing test
indices.put_index_template	🔴	126/149 → 59/68	149/149 → 68/68
indices.put_mapping	🔴	140/143 → 118/121	146/146 → 124/124
indices.refresh	🟢	313/313 → 282/282	313/313 → 282/282
indices.resolve_index	🟢	9/9 → 6/6	9/9 → 6/6
indices.rollover	🔴	54/54 → 27/27	2/54 → 2/27
indices.shard_stores	🔴	6/6 → 5/5	5/6 → 4/5
indices.simulate_index_template	🔴	7/9 → 6/7	6/9 → 5/7
indices.stats	🔴	125/125 → 116/116	30/124 → 30/115
indices.update_aliases	🔴	33/33 → 26/26	7/33 → 7/26
inference.put	🟢	6/6 → 4/4	6/6 → 4/4
ingest.put_pipeline	🟢	74/74 → 60/60	74/74 → 60/60
ingest.simulate	🟢	12/12 → 10/10	12/12 → 10/10
migration.post_feature_upgrade	🟢 → 🔴	1/1	1/1 → 0/1
nodes.info	🟢	116/116 → 112/112	116/116 → 112/112
nodes.stats	🔴	58/58 → 51/51	18/58 → 13/51
query_rules.put_ruleset	🟢	17/17 → 16/16	17/17 → 16/16
security.authenticate	🔴 → 🟢	30/30	25/30 → 30/30
security.create_service_token	🟢	2/2 → 3/3	2/2 → 3/3
snapshot.create	🟢	30/30 → 29/29	30/30 → 29/29
snapshot.delete	🟢	24/24 → 23/23	24/24 → 23/23
snapshot.get	🟢	16/16 → 13/13	16/16 → 13/13
synonyms.delete_synonym_rule	🟢	8/8 → 7/7	8/8 → 7/7
synonyms.get_synonyms_sets	🟢	7/7 → 6/6	7/7 → 6/6
synonyms.put_synonym	🟢	32/32 → 28/28	32/32 → 28/28
synonyms.put_synonym_rule	🟢	5/5 → 4/4	5/5 → 4/4
watcher.ack_watch	🟢	6/6 → 1/1	6/6 → 1/1
watcher.activate_watch	🟢	3/3 → 1/1	3/3 → 1/1
watcher.deactivate_watch	🟢	3/3 → 1/1	3/3 → 1/1
watcher.delete_watch	🟢	11/11 → 2/2	11/11 → 2/2
watcher.execute_watch	🔴 → 🟢	41/62 → 7/7	8/62 → 7/7
watcher.get_settings	🟢 → ⚪	4/4 → Missing test	4/4 → Missing test
watcher.get_watch	🔴 → 🟢	46/46 → 9/9	43/46 → 9/9
watcher.put_watch	🔴	75/91 → 29/38	91/91 → 38/38
watcher.query_watches	🔴 → ⚪	1/1 → Missing test	0/1 → Missing test
watcher.start	🟢	3/3 → 1/1	3/3 → 1/1
watcher.stats	🟢	7/7 → 1/1	7/7 → 1/1
watcher.stop	🟢	2/2 → 1/1	2/2 → 1/1
watcher.update_settings	🔴 → ⚪	0/3 → Missing test	3/3 → Missing test
xpack.usage	🔴	43/43 → 40/40	1/39 → 2/36

You can validate these APIs yourself by using the make validate target.