remove unnecessary UDFs in microsalt sample BE (#3886)(patch)

## Description
As requested in Clinical-Genomics/clinical-genomics-ui#545, we are removing `quantity` and `concentration_sample` from MicrobialSample model in `cg/models/orders/samples.py`

### Changed

- Microbial Sample
- Fixtures from Microsalt and SARS-Cov2

cg/models/orders/samples.py

@@ -265,20 +265,9 @@ class MicrobialSample(OrderInSample):
     well_position: str | None
     # "Required if "Other" is chosen in column "Species""
     organism_other: constr(max_length=Organism.internal_id.property.columns[0].type.length) | None
-    # "These fields are not required"
-    concentration_sample: float | None
-    quantity: int | None
     verified_organism: bool | None  # sent to LIMS
     control: str | None
 
-    @validator("quantity", pre=True)
-    def str_to_int(cls, v: str) -> int | None:
-        return OptionalIntValidator.str_to_int(v=v)
-
-    @validator("concentration_sample", pre=True)
-    def str_to_float(cls, v: str) -> float | None:
-        return OptionalFloatValidator.str_to_float(v=v)
-
 
 class MicrobialFastqSample(OrderInSample):
     _suitable_project = OrderType.MICROBIAL_FASTQ

tests/fixtures/cgweb_orders/microsalt.json

@@ -18,8 +18,6 @@
       "container": "96 well plate",
       "container_name": "name of plate",
       "well_position": "A:1",
-      "quantity": "102",
-      "concentration_sample": "101",
       "comment": "plate comment"
     },
     {
@@ -88,8 +86,6 @@
       "container": "Tube",
       "container_name": "optional-fields",
       "well_position": "",
-      "quantity": "202",
-      "concentration_sample": "201",
       "comment": "optional comment"
     }
   ]

tests/fixtures/cgweb_orders/sarscov2.json

@@ -7,7 +7,6 @@
       "application": "VWGDPTR001",
       "collection_date": "2021-05-05",
       "comment": "plate comment",
-      "concentration_sample": "101",
       "container": "96 well plate",
       "container_name": "name of plate",
       "data_analysis": "mutant",
@@ -22,7 +21,6 @@
       "pre_processing_method": "COVIDSeq",
       "primer": "Illumina Artic V3",
       "priority": "research",
-      "quantity": "102",
       "reference_genome": "NC_111",
       "region": "Stockholm",
       "region_code": "01",
@@ -113,7 +111,6 @@
       "application": "VWGDPTR001",
       "collection_date": "2021-05-05",
       "comment": "optional comment",
-      "concentration_sample": "201",
       "container": "Tube",
       "container_name": "optional-fields",
       "data_analysis": "mutant",
@@ -128,7 +125,6 @@
       "pre_processing_method": "COVIDSeq",
       "primer": "Nanopore Midnight V1",
       "priority": "research",
-      "quantity": "202",
       "reference_genome": "NC_555",
       "region": "Stockholm",
       "region_code": "01",
@@ -141,7 +137,6 @@
       "application": "VWGDPTR001",
       "collection_date": "2021-05-05",
       "comment": "optional comment",
-      "concentration_sample": "201",
       "container": "Tube",
       "container_name": "optional-fields",
       "data_analysis": "mutant",
@@ -155,7 +150,6 @@
       "pre_processing_method": "COVIDSeq",
       "primer": "Nanopore Midnight V1",
       "priority": "research",
-      "quantity": "202",
       "reference_genome": "NC_555",
       "region": "Stockholm",
       "require_qc_ok": false,