Address.isValidRawAddress missing private and private test network types

[fboucquez]

https://github.com/symbol/symbol-sdk-typescript-javascript/blob/main/src/model/account/Address.ts#L81

misses 'P' and 'V'.

Same here

https://github.com/symbol/symbol-sdk-core-typescript/blob/main/src/core/Address.ts#L72

Note: the static/harcoded chars can be removed. These can be derived from network type numbers...

https://github.com/symbol/catapult-rest/blob/main/catapult-sdk/src/model/address.js#L51

[gimre-xymcity]

linked line is not checking network types, it checks LAST byte, which due to encoding 24 bytes can have only 4 values

("missing" last byte = 8 bits, meaning, you're loosing one 5-bit base32-value - and means last value will always have 3-of-5 bits set to zero, ergo 4 values)