Fix growth_estimates for new key `LTG`

[ericpien]

Summary

• LTG (long-term growth ?) is new to the API but its meaning is not shown on yahoo yet.
• Support for 5 year numbers seem to have been removed. so commenting it out.
• Fixes: https://github.com/ranaroussi/yfinance/issues/2126

Examples: LTG row and 5 year numbers are not shown in the links below.

• https://finance.yahoo.com/quote/MSFT/analysis/
• https://finance.yahoo.com/quote/AAPL/analysis/
• https://finance.yahoo.com/quote/TSLA/analysis/

Sample: import yfinance as yahooFinance

msft = yahooFinance.Ticker("MSFT")
print(msft.growth_estimates) # now works