Change ServerTelemetryEntity from Class to Type

[tnorling]

Continuation of the work to convert cache entities from classes to types and moving the related static methods to CacheHelpers namespace

[codecov-commenter]

Codecov Report

Merging #6651 (2ce0744) into dev (81d34b4) will decrease coverage by 20.89%.
Report is 375 commits behind head on dev.
The diff coverage is 57.25%.

Flag	Coverage Δ
msal-angular	?
msal-browser	?
msal-common	?
msal-core	?
msal-node	?
msal-node-extensions	64.11% <57.25%> (-11.54%)	⬇️
msal-react	?
node-token-validation	?

Files	Coverage Δ
.../msal-node-extensions/src/error/NativeAuthError.ts	100.00% <100.00%> (ø)
extensions/msal-node-extensions/src/index.ts	100.00% <100.00%> (ø)
...nsions/msal-node-extensions/src/packageMetadata.ts	100.00% <100.00%> (+100.00%)	⬆️
...-extensions/src/persistence/DataProtectionScope.ts	100.00% <100.00%> (ø)
...nsions/msal-node-extensions/src/utils/Constants.ts	100.00% <100.00%> (ø)
...sions/msal-node-extensions/src/utils/TypeGuards.ts	100.00% <100.00%> (ø)
...msal-node-extensions/src/error/PersistenceError.ts	62.50% <66.66%> (-11.58%)	⬇️
...node-extensions/src/persistence/BasePersistence.ts	64.28% <50.00%> (-2.39%)	⬇️
extensions/msal-node-extensions/src/Dpapi.ts	33.33% <33.33%> (-66.67%)	⬇️
...tensions/src/persistence/PersistenceCachePlugin.ts	71.05% <55.55%> (-4.63%)	⬇️
... and 8 more

... and 215 files with indirect coverage changes