Remove tlsAllowInvalidCertificates option #1141

Job	Run time
Unit tests	2m 26s
Check libraries	35s
Lint	12s
Build charms / Get workflow version / Get workflow version	1s
Build charms / Collect charms	9s
Build charms / Build mongodb charm \| base #0	2m 46s
Build charms / Build legacy-application charm \| base #0	1m 24s
Build charms / Build application charm \| base #0	1m 16s
charm-integration	10m 0s
ha-integration	49m 25s
relation-integration	18m 19s
legacy-integration	3m 18s
tls-integration	20m 18s
backup-integration	54m 23s
metric-integration	18m 24s
sharding-integration	50m 34s
sharding-relation-integration	12m 45s
	4h 6m 15s

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