hotfix: Temporarily skip datagrams generated by EC150

[leewujung]

This PR includes changes to ParseEK to skip reading and saving datagrams generated by EC150 ADCP.

We can actually parse the echosounder-equivalent data fine, but we still need 2 other pieces to carry it to the next stage, so this is a "hotfix" to just skip these datagrams for now. The pieces we need are:

• determine where to save the complex or power data: as a separate Beam_group3 or with the previous Beam_group1/2?
• make sure calibration code can run through fine: not sure at the moment if all the necessary broadband calibration parameters are in place, but looks like all the necessary narrowband calibration parameters are there.

This PR still needs:

• tests with small test file
• an issue that document needed changes for follow-up work (Store and calibrate EC150 echo strength data #1358)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 90.90909% with 2 lines in your changes missing coverage. Please review.

Project coverage is 78.87%. Comparing base (9f56124) to head (b34f7bb).
Report is 123 commits behind head on main.

Files	Patch %	Lines
echopype/convert/parse_base.py	90.90%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1357      +/-   ##
==========================================
- Coverage   83.52%   78.87%   -4.65%     
==========================================
  Files          64       16      -48     
  Lines        5686     2708    -2978     
==========================================
- Hits         4749     2136    -2613     
+ Misses        937      572     -365     

Flag	Coverage Δ
unittests	78.87% <90.90%> (-4.65%)	⬇️

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[ctuguinay]

Thanks looks good, just commented out a print statement!