docs: fix 13 typos and grammar errors in comments and documentation

[Avicennasis]

Summary

Fix 13 typos and grammar errors across 6 files.

pkg/throttle/check.go

• // ThrottlerCheck provides methdos for an app checking on metrics → // ThrottlerCheck provides methods for an app checking on metrics
• itself becoming unhealthy, makind b's read into a's state as unheathly, → itself becoming unhealthy, making b's read into a's state as unhealthy,
• It therefore must not participate the → It therefore must not participate in the
• shared-domain dependency check., → shared-domain dependency check.
• // AggregatedMetrics is a convenience acces method into throttler's aggreg...→// AggregatedMetrics is a convenience access method into throttler's aggre...
• // MetricsHealth is a convenience acces method into throttler's metricsHea...→// MetricsHealth is a convenience access method into throttler's metricsHe...

pkg/group/store.go

• // ThrottleApp, as implied by consensusService, is a raft oepration request... → // ThrottleApp, as implied by consensusService, is a raft operation request...
• // UnthrottleApp, as implied by consensusService, is a raft oepration reque... → // UnthrottleApp, as implied by consensusService, is a raft operation reque...

internal/raft/inmem_transport.go

• // a randomly generate UUID as the ID. → // a randomly generated UUID as the ID.

pkg/config/mysql_config.go

• IgnoreHostsCount int // Number of hosts that can be skipped/ignore... → IgnoreHostsCount int // Number of hosts that can be skipped/ignore...

pkg/config/config.go

• // Initially, the settings are the defult ones defined by newConfigurationS... → // Initially, the settings are the default ones defined by newConfiguration...
• // Some of the settinges have reasonable default values, and some other → // Some of the settings have reasonable default values, and some other

internal/raft/config.go

• // If ShutdownOnRemove is is set, we additional shutdown Raft. Otherwise, → // If ShutdownOnRemove is set, we additionally shutdown Raft. Otherwise,

Comments, documentation and message strings only — no functional changes.