support time_weighted functions

[Jasmine-ge]

PR checklist:

• Did you run ClangFormat ?
• Did you separate headers to a different section in existing community code base ?
• Did you surround proton: starts/ends for new code in existing community code base ?

Please write user-readable short description of the changes:
close #866

[Jasmine-ge]

New function

_time_weighted(x, timestamp) / _time_weighted(x, timestamp, end_time)

Current only support avg_time_weighted and median_time_weighted

Arguments

x — values to be calculated. [integer, float, decimal]

timestamp — time when each data is collected. [date, date32, datetime, datetime64]

end_time — time used to calculate final value [should be the same datatype as timestamp]
Can be omit, if is omitted than the last value won't be calculated.