Changelog (v5.4.0-RC1...v5.4.0)

• bug [Messenger] Leverage DBAL's getNativeConnection() method #44309 [Messenger] Leverage DBAL's getNativeConnection() method (@derrabus)
• bug [FrameworkBundle] Fix property-info phpstan extractor discovery #44300 [FrameworkBundle] Fix property-info phpstan extractor discovery (@1ed)
• feature [Notifier] add Vonage bridge to replace the Nexmo one #44271 [Notifier] add Vonage bridge to replace the Nexmo one (@nicolas-grekas)
• bug [Translation] [Loco] Fix idempotency of LocoProvider write method #44187 [Translation] [Loco] Fix idempotency of LocoProvider write method (@welcoMattic)
• bug [Security] Do not overwrite already stored tokens for REMOTE_USER authentication #43992 [Security] Do not overwrite already stored tokens for REMOTE_USER authentication (@stlrnz)
• bug [Validator] Fix validation for single level domains #43876 [Validator] Fix validation for single level domains (@HypeMC)
• bug [Debug][ErrorHandler] Increased the reserved memory from 10k to 32k #44327 [Debug][ErrorHandler] Increased the reserved memory from 10k to 32k (@sakalys)
• bug [Process] intersect with getenv() in case-insensitive manner to get default envs #44261 [Process] intersect with getenv() in case-insensitive manner to get default envs (@stable-staple)
• bug [Serializer] fix support for lazy/unset properties #44295 [Serializer] fix support for lazy/unset properties (@nicolas-grekas)
• bug [Notifier] Fix AllMySms bridge body content #44277 [Notifier] Fix AllMySms bridge body content (@afiocre)
• bug [DoctrineBridge] Revert " add support for the JSON type" #44269 [DoctrineBridge] Revert " add support for the JSON type" (@dunglas)