fix: [IOBP-797] Hide total amount label if total amount not present

[Hantex9]

Short description

This PR hides the "total amount" label if the gran total is not provided by the backend;

List of changes proposed in this pull request

• Added a conditional render to the PaymentsBizEventsTransactionTotalAmount component that is used to render the gran total amount;

How to test

You should open a transaction of any payment and check that the total amount label is provided only and only if there is even the amount on the right and if it is not present, that label should not be visible anymore

[pagopa-github-bot]

Affected stories

• 🐞 IOBP-797: Togliere label "totale" dalle ricevute in cui non c'è il grand total

Generated by 🚫 dangerJS against f12daff

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 47.78%. Comparing base (4f204b4) to head (f12daff).
Report is 391 commits behind head on master.

Files	Patch %	Lines
...nts/PaymentsBizEventsTransactionHeadingSection.tsx	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6070      +/-   ##
==========================================
- Coverage   48.42%   47.78%   -0.65%     
==========================================
  Files        1488     1714     +226     
  Lines       31617    34370    +2753     
  Branches     7669     8291     +622     
==========================================
+ Hits        15311    16423    +1112     
- Misses      16238    17886    +1648     
+ Partials       68       61       -7     

Files	Coverage Δ
...tures/payments/bizEventsTransaction/utils/index.ts	70.73% <100.00%> (ø)
...nts/PaymentsBizEventsTransactionHeadingSection.tsx	4.00% <0.00%> (ø)

... and 1159 files with indirect coverage changes

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[shadowsheep1]

LGTM