Incorrect date parsing for year 1-999

[a88zach]

Issue Description

There is an edge case with very early years where the date parsing logic is incorrect. The code here does not handle years 1-999 correctly: https://github.com/typeorm/typeorm/blob/51b2a63d/src/util/DateUtils.ts#L25

As an example, if the date stored in the database is 0202-01-01 which is a valid date, the output from parsing will be 202-01-01. This format breaks validation when returning a response if validation requires a valid ISO date format

Expected Behavior

A date from year 1 to year 999 should contain a leading 0 when parsed from the database

Actual Behavior

The leading 0 is being stripped from the date

Additional Context

Relevant Database Driver(s)

DB Type	Reproducible
aurora-mysql	no
aurora-postgres	no
better-sqlite3	no
cockroachdb	no
cordova	no
expo	no
mongodb	no
mysql	no
nativescript	no
oracle	no
postgres	yes
react-native	no
sap	no
spanner	no
sqlite	no
sqlite-abstract	no
sqljs	no
sqlserver	no

Are you willing to resolve this issue by submitting a Pull Request?

• ✅ Yes, I have the time, and I know how to start.
• ✖️ Yes, I have the time, but I don't know how to start. I would need guidance.
• ✖️ No, I don’t have the time, but I can support (using donations) development.
• ✖️ No, I don’t have the time and I’m okay to wait for the community / maintainers to resolve this issue.