Merge remote-tracking branch 'origin/fix_coreset_start' into integration_2025_w52 (!3819)

CORESET start multiple of 6 fix

According to the standard any CORESET (except CSET0) would always start
from the first common resource block index which is multiple of 6 in the
BWP. This was not taken into account in the code. The BWP switch CI test
is modified to test a BWP start not multiple of 6.

An exception is the case where rb-Offset-r16 parameter is set, but can't
be used at gNB for FAPI compatibility.

Closes: #1037

ci-scripts/conf_files/gnb-du.sa.band78.106prb.usrpb200.conf

@@ -149,7 +149,7 @@ gNBs =
     bwp_list = (
       { scs = 1; bwpStart = 0; bwpSize = 106;},
       { scs = 1; bwpStart = 0; bwpSize = 36;},
-      { scs = 1; bwpStart = 36; bwpSize = 70;}
+      { scs = 1; bwpStart = 40; bwpSize = 50;}
     );
 
     # ------- SCTP definitions

ci-scripts/xml_files/container_sa_e1_b200_quectel.xml

@@ -183,7 +183,7 @@
     <iperf_args>-t 10 -R</iperf_args>
     <id>idefix</id>
     <svr_id>sabox-nepes</svr_id>
-    <iperf_tcp_rate_target>85</iperf_tcp_rate_target>
+    <iperf_tcp_rate_target>65</iperf_tcp_rate_target>
   </testCase>
 
   <testCase id="400003">